Jewel setting holder



May 9, 19394 w. M. HUDGENS Er AL 2,157,789

JEWEL SETTING HOLDER Filed July 26, 1938 ATTO RN EYS Patented May 9,1939 JEWEL SETTING HOLDER Application .luly 26, 1938, Serial No. 221,463

3 Claims.

This invention relates to a jewel setting holder and has for an objectto provide a device for securely holding the disc-like setting of afriction jewel for watches and other precision instru- 5 ments while thesame is being reamed to receive the jewel.

Hitherto difficulty has been experienced in holding the setting so thatit would not become dislodged upwardly when the roaming tool was 10withdrawn.

With this disadvantage in mind the present invention provides novel jawsfor overlapping the top of the jewel and holding the same againstdislodgement.

A further object is to provide a device of this character which will beformed of a few strong simple and durable parts, which will beinexpensive to manufacture and which will not easily get out of order.

With the above and other objects in view the invention consists ofcertain novel details of construction and combinations of partshereinafter fully described and claimed, it being understood thatvarious modifications may be resorted to within the scope of theappended claims without departing from the spirit or sacrificing any ofthe advantages of the invention.

In the accompanying drawing forming part of this specification:

Figure 1 is a plan View of a jewel setting holder constructed inaccordance with the invention.

Figure 2 is a longitudinal sectional View of the holder taken on theline 2 2 of Figure 1 and showing a jewel setting in dotted linesthereon.

Figure 3 is a fragmentary cross sectional view taken on the line 3 3 ofFigure l.

Referring now to the drawing in which like characters of referencedesignate similar parts in the various views, Il designates acylindrical body 40 having a stem II disposed axially on the bottomthereof. A cylindrical opening I2 extends axially through the stem andbody and is threaded at the lower end toreceive a screw I3 for anchoringthe device to the reaming machine.

A pair of brackets Ill are disposed upon diametrically opposite sides ofthe body, each comprising an upright arm I5, a horizontally disposed armI6 at the bottom of the upright arm, and a downwardly extending arm I'Iwhich .is 50 secured to the body in any preferred manner.

The upright arms I5 are provided with aligned openings to receiveadjusting screws I8 which are disposed in alignment beyond the upper endface of the body I0. Each screw is provided 55 with a smooth reduced endI9 and stop collars 2l) are formed on opposite sides of the smoothportion.

The upper end face of the body I is provided with a groove 2i whichextends all the way across the face between the set screws and isprovided with an enlarged lower portion 22 which forms overhangingledges 23. A pair of right angular jaws 24 are slidably mounted in theenlarged portion 22 of the groove and are held therein by theoverhanging ledges 23, as best shown in Figure 3.

The upright leg of each jaw is provided with a smooth bore opening 25which receives the smooth reduced end I9 of a respective set screw. Thecollars of the set screw engage the upright leg between them so thatwhen the set screw is advanced or retracted the jaw will be advanced orretracted in the slot.

The jaws 24 are cut away to form substantially V-shaped working faces 26which engage the periphery of the disc like jewel setting shown indotted lines at 2l in Figure 2. These working faces are beveled to slopedownwardly and rearwardly as shown by dotted lines at 28 in Figure 1from the jewel setting so that the upper portions thereof extend overthe jewel setting and hold the jewel setting against rising from betweenthe jaws when the reaming tool is withdrawn.

In operation the jewel setting 2l to be reamed is placed upon the worksupporting face of the body I between the jaws 24 and the set screws I8are then adjusted to cause the jaws to grip the periphery of the jewelsetting at diametrically opposite points. The reaming operation may nowbe performed with accuracy since the beveled surfaces of the workingfaces of the jaws hold the jewel setting stationary at all times duringand after the reaming operation.

From thhe above description it is thought that the construction andoperation of the invention will be fully understood without furtherexplanation.

What is claimed is:

l. A jewel setting holder comprising a support having a work supportingface adapted to support a jewel setting to be reamed, jaws movableacross the face toward and away from each other and having V-shapedopposed ends beveled downwardly for overlapping the edge of a jewelsetting and clamping the same firmly to the work supporting face of thesupport.

2. A jewel setting holder comprising a support, means for securing thesupport to a reaming machine, the support having a transversely groovedhat working face, the groove having an enlarged grooves and havingupstanding portions, the rst named portions of the jaws having V-shapedopposed working ends beveled downwardly to overlap and clamp a jewelsetting to said working face at said bore, bracket arms rising fromdiametrically opposite points of said support, and adjusting screwsthreaded through said bracket arms and swivelly connected to saidupright portions of the jaws for adjusting the jaws toward and away fromeach other.

WAMAN MONROE HUDGENS. MARK C. HUDGENS.

